circles and radius and center

Hi Have found the one of the circle formulas to be x^2+y^2-4x-10y+19=0. My problem is finding the radius and center with this equation. Can you help me with this question. Also, please show the steps to how you got your answer. Thanks!

Hi Have found the one of the circle formulas to be x^2+y^2-4x-10y+19=0. My problem is finding the radius and center with this equation. Can you help me with this question. Also, please show the steps to how you got your answer. Thanks!

Hi starrynight,

there are 2 general ways, one way being to find "g" and "f" by inspection from

then the centre is

then use g and f to find r, using

centre is (2,5)

Alternatively, complete the squares for x and y, using half the coefficents
of x and y.